Cylinder relief-valve.



PATENTEVD FEB. 25, 1908.

M. BOHN. CYLINDER RELIEF VALVE.

APPLICATION FILED AUG. 5, 1907.

2 SHEETS-SHEET 1.

@w an mm, \m

c WWW l a 2%? ms NORRIS BETLRS co., WASHING'ION, u. c.

PATBNTBD FEB. 25, 1908.

M. BOHN.

CYLINDER RELIEF VALVE.

APPLICATION FILED AUG. 5, 1907.

2 SHEETS-SHEET 2.

Illlllllll MAL7%6LQB,0/ZQZ UNITED STATES MATHEW BOHN, OF PUEBLO, COLORADO.

CYLINDER RELIEF-VALVE.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed August 5. 1907. Serial No. 387.186.

To all whom it may concern:

Be it known that I, MATHEW BoHN, a citizen of the United States, residing at Pueblo, in the county of Pueblo and State of Colorado have invented certain new and useful Improvements in Cylinder Relief-Valves and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention has relation to new and useful improvements in cylinder relief valves adapted to be operated by pressure, and has .for its principal object to provide a simple and inexpensive valve of this type adapted to be readily and easily applied in position to the cylinders through the use of which the cumbersome and complicated mechanical devices now employed to open the cylinder cocks or valves may be dispensed with.

A further object of the invention is to provide a valve of this character, that may be arranged at any suitable point with reference to the engine or locomotive to which it is attached, making it possible to eliminate all liability of the cylinders becoming broken or danlilaged by rocks or other missiles in their pat With the foregoing, and other objects in view that will readily appear as the nature of the invention is readily understood, the invention consists of certain novel features of construction, combination and arrangement of parts illustrated in the drawings, and particularly pointed out'in the appended claims.

In the accompanying drawings: Figure 1 is a side elevation of the invention applied to a locomotive. Fig. 2 is a top plan view of Fig. 1, the front end of the boiler broken away to more advantageously show the con nection or arrangement for establishing communication between the relief valves and the interior of the boiler. Fig. 3 is a sectional longitudinal view of one of the cylinders with the relief valves in position; and Fig. 4 is a horizontal sectional view on the line 4-4 of Fig. 3.

Referring to the drawings for a more particular description of the invention, numerals 1 and 2 indicate respectively the cylinders and boiler of a locomotive, and 3 the relief valves. Said valves are of identical construction and therefore only one need be described. Each of the said valves comprises an upper connecting member 4 having a body portion 5 of preferably hexagonal form having a central upright exterior threaded tubular stem 6 at its top whereby the valve may be screwed in position to one of the cylinders. An exteriorly threaded portion 7 depends from the bottom of said body portion and is provided with an outer end wall 7 formed with a central aperture 8 to correspond with the internal diameter of the tubular stem 6. Said body portion is also provided with a central vertical bore 9, of a diameter preferably slightly greater than the I bore of the depending portion 7. A transverse bore 10 is formed in one side of the body portion and communicates with the interior thereof, the purpose of which will be disclosed.

A plunger 11 is arranged to work through said upper member 4. Said plunger is of circular form in cross-section at its lower end to correspond with or fit the bore 8 of said portion 7, and is preferably of equilateral triangular form in crosssection at its upper part to provide vertical spaces 12. The upper end of said plunger is provided with an outwardly flared portion which is a prolongation of the plunger and constitutes a valve adapted to normally bear or rest in a corresponding valve seat formed in the upper end of the tubular stem 6. The lower end of the plunger normally projects some little distance below the lower end of said member 4 and terminates in a reduced portion 13, having a thread 14 at its outer end, to which portion a piston 15 may be movably secured y a nut 16. Said piston is adapted to the work in a corresponding cylinder 17 having an interior thread 18 at its upper end where by it may be screwed to depending exteriorly threaded portion 7 of the upper member. Said cylinder is closed in at its lower end by a wall 19 having a central vertical threaded bore 20, the purpose of which will be dis closed.

In practice, when it is desirous to relieve the cylinders of any condensed water or steam, steam from the boiler of the locomotive or engine to which the relief valves are attached, is admitted under the pistons 15, causing the plunger to move upward until the pistons abut against the depending portion 7 of the upper member 4 and raise the valves from their seats. When the plungers are in this position movement of the pistons in the cylinders of the locomotive or other engines to which the relief valves are applied drive the condensed Water out of the cylinders through the vertical spaces 12 and thence out of the transverse bore 10 in the body portion of the upper member, the lower ends of the plungers sealing the passage of thewater through the bores S of the depending portions 7.

While various arrangements or connectionsfor admitting steam from the boiler of the locomotive or engine to which the relief valves are attached, may be used I have shown and will describe a connection or arrangement that is preferably employed.

A three-way valve 21 is mounted on the boiler at a suitable point. A pipe 22 of suitable size, preferably one half inch in diameter is arranged to establish communication between the relief valve and the interior of the boiler. A pipe 23 also communicates with the relief valve at a second point and is disposed vertically relative to the plane of the boiler. A pipe 24 also communicates with said valve at a third point and runs inwardly along one side of the boiler to near the inner end of the adjacent cylinder, and is provided at said end with a reducing T 25. Pipes 26 are screwed to said reducing T and lead to points adjacent the inner end of the cylinders.

Pipes 27 are connected with the outer end of the pipes 26 by unions 28 to other equiva lent means and extend to suitable points behind the cylinders. Pipes 29 are also connected with the outer ends of the pipes 27 by T connections 30 and run or extend to suitable points under the cylinders. Pipes 31 are connected with the outer ends of said pipes 29 by unions 32 and are screwed at their opposite ends in the bottoms of the invention will be understood without requiring'a more extended explanation.

Having described the invention, what I claim as new and desire to secure by Letters Patent is:

A cylinder relief valve for locomotives, one or more of said valves being attached to each of the cylinders and each of said valves, embracing a connecting member comprising an intermediate body portion formed with a central longitudinal bore and with a second bore extending from the'wall of the longitudinal bore, an upright exteriorly threaded tubular stem adapted for screwed engagement with an engine cylinder and a central exteriorly threaded depending portion closed in at its outer end by a centrally apertured end wall, the diameter of such aperture corresponding with that of the tubular stem bore and being slightly less than that of the body portion, a plunger movable longitudinally through the connecting member, the end portion of the plunger being of cylindrical form to closely fit the aperture and itsopposite end portion of triangular form in cross-section to form steam passages between its sides and the Wall of the tubular stem, an outwardly flared enlargement formed at said last mentioned end portion to normally close the inner end of the tubular stem, a cylinder formed with an outer centrally apertured end wall, screwed to the depending portion of the connecting member and a piston arranged at the outer end of the plunger and to closely fit within the cylinder, a fluid supply pipe, extending forwardly along the locomotive boiler, the rear end of said pipe communicating with the interior of the boiler, and the forward end of the same leading under the boiler to a point in rear of the cylinders, and suitable branch connections leading from the forward end of the supply pipe to the several relief valves.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

MATHEWV BOHN. Witnesses:

MICHAEL REIswIoK, MAYME SPAN. 

